Grouped dependabot pull requests (#373)

News: https://github.blog/changelog/2023-08-24-grouped-version-updates-for-dependabot-are-generally-available/

Author: Rotzbua

.github/dependabot.yml

@@ -6,3 +6,7 @@ updates:
   directory: "/"
   schedule:
     interval: "monthly"
+  groups:
+    github-actions:
+      patterns:
+        - "*"